Add make target to deploy to Firebase

The configuration file has been split into 2: one for development mode
and another one for production mode.

Change-Id: I12917cd79c95642adc30004be5bc1a927bca389b
diff --git a/frontend/src/config.json5 b/frontend/src/config.json5
index 07bff27..3d26583 100644
--- a/frontend/src/config.json5
+++ b/frontend/src/config.json5
@@ -4,5 +4,5 @@
     clientId: '223047594100-ha7istt4csc0mlq11heogk7bqvmpbqo0.apps.googleusercontent.com',
   },
   // URL of the GRPC host
-  grpcWebHost: 'http://localhost:8081'
+  grpcWebHost: 'https://twpt-grpc-web.avm99963.com'
 }